Elementary school massacre

Posted By:

A kindergarten teacher's son, clad in black and carrying two 9mm pistols, rampaged through a Connecticut elementary school Friday, killing 20 small children and six adults, a tragedy President Barack Obama said had broken the hearts of America.

The gunman, identified as Adam Lanza, 20, was found dead at the scene of the slaughter, Sandy #### ########## ###### in Newtown, law enforcement officials said. The body of a woman believed to be his mother was found at their home in Newton, authorities said.

Officials initially misidentified the shooter to NBC News as Lanza's brother, Ryan. But a senior official later said that Ryan was nowhere near the shooting, is not believed to be involved, and is cooperating with the investigation.

Ryan told police that Adam has a history of mental illness, according to the senior official. Yet the motive for the mass killing – the nation’s second-worst school shooting -- was a mystery.

The weapons used in the attack were legally purchased and were registered to the gunman's mother, two law enforcement officials said. Two 9mm handguns were recovered inside the school. An AR-15-type rifle also was found at the scene, but there were conflicting reports Friday night whether it had been used in the shooting.